<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .b {
            width: 1000px;
            height: 60px;
            background-color: #000;
        }

        .b1 {
            width: 146px;
            height: 60px;
            background-color: rgb(111, 30, 30);
            float: left;
        }

        .b2 {
            width: 119px;
            height: 60px;
            background-color: rgb(111, 30, 30);
            float: left;
        }

        .b3 {
            width: 133px;
            height: 60px;
            background-color: rgb(111, 30, 30);
            float: left;
        }
    </style>
</head>

<body>
    <div class="b">
        <div class="b1"></div>
        <div class="b2"></div>
        <div class="b2"></div>
        <div class="b2"></div>
        <div class="b2"></div>
        <div class="b2"></div>
        <div class="b2"></div>
        <div class="b3"></div>
    </div>

    <div class="c"></div>

</body>

</html>